Operator interface



FIG. 1 is a front perspective view of an operator interface incorporating our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof; and,

FIG. 6 is a front view thereof.

The broken lines showing the key and key-ring depict environmental structure and form no part of the claim; the broken lines showing the icons and two dimensional images on the front surfaces depict unclaimed surface indicia are for illustrative purposes only and form no part of the claimed design; while all other broken lines in the drawings depict portions of the operator interface that form no part of the claimed design. 

CLAIM The ornamental design for an operator interface, as shown and described. 